Understanding and design of spin-driven thermoelectrics

Polash, Mobarak Hossain; Moseley, Duncan H.; Zhang, Junjie; Hermann, Raphaël; Vashaee, Daryoosh

doi:10.1016/j.xcrp.2021.100614

Cited by 21 publications

(18 citation statements)

References 91 publications

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“…The S enhancement methods we discussed above are all based on spin-degenerate semiconductors. In non-spin-degenerate TE materials, spin provides a new dimension for the enhancement of the S. 32 There are four main ways of spin caloritronic effects that have been applied to enhance the S: 33 magnon drag, paramagnon drag, spin entropy and spin fluctuation (SF). The spin Seebeck effect (SSE) provides a new dimension toward S enhancement.…”

Section: Spin Caloritronic Effectmentioning

confidence: 99%

“…For future study of enhancing the S for high-performance TE materials, we think that the interdisciplinary studies play the key role. Lately, interdisciplinary studies have greatly enriched the optimization method of S. 32,33,36 Some are based on the generalized S. The spin caloritronic effect adds new freedom to the enhancement of the S. 34 Magnons and paramagnons give a similar drag effect like phonons, leading to an extra S from the diffusion part. 36,38 These methods demonstrate the possibility of finding high-performance TE materials in magnetic materials.…”

Section: ■ Conclusion and Perspectivesmentioning

confidence: 99%

“…There are four main ways of spin caloritronic effects that have been applied to enhance the S : magnon drag, paramagnon drag, spin entropy and spin fluctuation (SF). The spin Seebeck effect (SSE) provides a new dimension toward S enhancement …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolving Strategies Toward Seebeck Coefficient Enhancement

2023

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Metrics & MoreArticle Recommendations CONSPECTUS: Thermoelectric (TE) materials, interconverting electrical energy with heat energy, could improve energy utilization efficiency, optimize the energy structure, and promote sustainable economic and social development. The Seebeck coefficient (S), characterizing the output power, is a particularly important parameter for conversion efficiency of TE materials.In the past 200 years since the Seebeck effect was discovered, researchers have tried various ways to increase S to increase the TE performance of materials. In addition to traditional TE approaches to enhance the S, such as energy filtering effect and band convergence, innovative methods of improving the generalized S have emerged in interdisciplinary disciplines, like spin entropy.We have successfully optimized the S to boost the performance of many TE materials, such as SnTe, SnSe, and SnS. In this Account, we focus on the physical mechanisms affecting the S, discuss traditional and innovative methods to optimize the S, and look forward to some promising interdisciplinary approaches for further research to improve the S. First, we analyze the physical mechanism of the basic parameters and their effects on S. Optimizing the carrier concentration, the adjustment of scattering behavior and the increment of effective mass are common methods of improving the S. Second, we summarize several emerging interdisciplinary methods that could enhance the generalized S, like the spin caloritronic effect including magnon/paramagnon drag, spin entropy, and spin fluctuation. The spin Seebeck effect liberates the traditional direction limit between temperature and S and gives a new path toward the S enhancement. We also emphasize the significance of the utilization of phonon drag in the low temperature area. Third, based on previous work, we think the topological states regulation is a burgeoning innovative method for S enhancement of TE materials. Last, we discuss and envision some interdisciplinary strategies for further improving S in the future. This Account indicates that S could be regulated as required, and the interdisciplinary research is beneficial to expand the methods of optimizing TE parameters. We hope to draw the attention of researchers to the enhancement of S and TE performance via innovative study and guide researchers to promote the theoretical innovation research of TE materials.

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Section: Spin Caloritronic Effectmentioning

confidence: 99%

Section: ■ Conclusion and Perspectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolving Strategies Toward Seebeck Coefficient Enhancement

2023

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“…These Seebeck effects are conceptually very different and boost thermoelectric performances in distinct ways. 368 The spin-polarized Seebeck effect is similar to the conventional Seebeck effect with spin polarization. Unlike the generation of charge-carrier-driven voltage in the conventional Seebeck effect, the spin Seebeck effect (SSE) essentially demonstrates the transverse spin voltage generated by spin pumping driven by a longitudinal temperature gradient, as shown in Fig.…”

Section: Modifying the Physical Propertiesmentioning

confidence: 79%

Recent advances in designing thermoelectric materials

2022

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Giant Spontaneous Magnetostriction in MnTe Driven by a Novel Magnetostructural Coupling Mechanism

Baral

Abeykoon

Campbell

et al. 2023

Adv Funct Materials

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A comprehensive x‐ray scattering study of spontaneous magnetostriction in hexagonal MnTe, an antiferromagnetic semiconductor with a Néel temperature of TN = 307 K, is presented. The largest spontaneous magnetovolume effect known for an antiferromagnet is observed, reaching a volume contraction of |ΔV/V| > 7 × 10−3. This can be justified semiquantitatively by considering bulk material properties, the spatial dependence of the superexchange interaction, and the geometrical arrangement of magnetic moments in MnTe. The highly unusual linear scaling of the magnetovolume effect with the short‐range magnetic correlations, beginning in the paramagnetic state well above TN, points to a novel physical mechanism, which is explained in terms of a trilinear coupling of the elastic strain with superposed distinct domains of the antiferromagnetic order parameter. This novel mechanism for coupling lattice strain to robust short‐range magnetic order casts new light on magnetostrictive phenomena and also provides a template by which the exceptional magnetostrictive properties of MnTe might be realized in a wide range of other functional materials.

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Understanding and design of spin-driven thermoelectrics

Cited by 21 publications

References 91 publications

Evolving Strategies Toward Seebeck Coefficient Enhancement

Evolving Strategies Toward Seebeck Coefficient Enhancement

Recent advances in designing thermoelectric materials

Giant Spontaneous Magnetostriction in MnTe Driven by a Novel Magnetostructural Coupling Mechanism

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